idk, sometimes i hear a very much small sounds, like gravel sounds it is annoy me, even when im dont moving, maybe it is bug????

honestly for me, i feel like the concrete sound is entirely replaced by gravel walking sound.

In EFT the concrete walking sound sounds like gravel, but it's because the operator has dirty shoes or something. Anyways dont worry, because its not an error. It's meant to sound like that.